Create __pycache__ dir when the pyc path is explicitly given

Patch from Arfrever Frehtes Taifersar Arahesis.

Lib/compileall.py

@@ -93,12 +93,6 @@ def compile_file(fullname, ddir=None, force=0, rx=None, quiet=False,
             cache_dir = os.path.dirname(cfile)
         head, tail = name[:-3], name[-3:]
         if tail == '.py':
-            if not legacy:
-                try:
-                    os.mkdir(cache_dir)
-                except OSError as error:
-                    if error.errno != errno.EEXIST:
-                        raise
             if not force:
                 try:
                     mtime = int(os.stat(fullname).st_mtime)

Lib/py_compile.py

@@ -124,7 +124,7 @@ def compile(file, cfile=None, dfile=None, doraise=False):
     if cfile is None:
         cfile = imp.cache_from_source(file)
     try:
-            os.mkdir(os.path.dirname(cfile))
+        os.makedirs(os.path.dirname(cfile))
     except OSError as error:
         if error.errno != errno.EEXIST:
             raise